Pencil in your own price for Crayon Physics Deluxe
It's up to you, then, whether you follow the example of the guy who paid $150 for World of Goo, or of the jerks who paid a penny. We might suggest that paying a penny for the game that he worked on for years is a pretty crummy birthday present to give Purho. Try the demo first — it's actually free.
[Via VG247]